Under laboratory conditions, a photosynthetic organism might convert 31% of the

Question

Under laboratory conditions, a photosynthetic organism might convert 31% of the light energy striking it to chemical bond energy of organic molecules. In reality, however, photosynthetic efficiency is far lower, closer to 5% or less. Considering a plant growing in a natural environment, suggest the reasons for this discrepancy. Some of the energy is lost for a plant growth. Some of the energy is lost as heat and entropy. There might be not enough oxygen in the air. The capacity of a photosystem to absorb energy may be saturated by a level of light far below the intensity of sunlight. Not all light will be of an appropriate wavelength. Many leaves may be shaded by leaves in the canopy above them. There is no light at night.

Explanation / Answer

PartA

Only the red and blue ends of the visible part of the electromagnetic spectrum are used by plants in photosynthesis. Shade-leaves often are more efficient in harvesting sunlight at low light levels, however, leaves exposed to sunlight display a higher light saturation point and maximum rate of photosynthesis. Duration of light exposure also affects photosynthesis as increased exposure up to 20hrs a day increased photosynthesis.

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.